<PAGE>   1
Exhibit 4.3(e)
LANVISION SYSTEMS, INC.

                       FOURTH AMENDMENT TO LOAN AGREEMENT



         THIS FOURTH AMENDMENT TO LOAN AGREEMENT ("Amendment") is executed
pursuant to and made a part of the Loan and Security Agreement dated July 17,
1998, by and between LANVISION SYSTEMS, INC., a Delaware corporation
("Borrower"), and THE HILLSTREET FUND, L.P., a Delaware limited partnership
("Lender"), as amended by letter agreements dated March 18, 1999, April 12,
1999, September 14, 1999 and Amendment Number 1, dated November 25, 1998, an
Amendment dated February 11, 2000, and Amendment Number 3, dated September 5,
2000 ( as amended, the "Loan Agreement").


         WHEREAS, Borrower and Lender wish to further amend the Loan Agreement
in accordance with the terms and provisions hereof.

         NOW, THEREFORE, the parties agree as follows:


         1. AMENDMENTS TO LOAN AGREEMENT. The following amendments shall be made
            to the terms of the Loan Agreement:

            (a) MINIMUM REVENUES AND EBIT. Section 6.4 of the Loan Agreement
                shall be amended in its entirety to read as follows:

            "Section 6.4 MINIMUM REVENUES AND EBIT.

            (a) MINIMUM REVENUES. On each of the Computation Dates set forth
                below, the Borrower shall not permit the total cumulative
                revenues (calculated for the period of time beginning on
                February 1, 2001 through such Computation Date) to be less than
                the minimum amount set forth bellow:


                                                           MINIMUM
                      COMPUTATION DATE               CUMULATIVE REVENUES
                      ----------------               -------------------

                      April 30, 2001                     $1,800,000

                      July 31, 2001                      $4,100,000

                      October 31, 2001                   $6,900,000

<PAGE>   2

                      January 31, 2002                   $10,200,000


            (b) MINIMUM EBIT. On each Computation date set forth below, the
                Borrower shall not permit the total Cumulative EBIT ( calculated
                for the period of time beginning on February 1, 2001 through
                such Computation Date) to be less than the minimum amount set
                forth below:


                                                          MINIMUM
                      COMPUTATION DATE                CUMULATIVE EBIT
                      ----------------                ---------------

                      April 30, 2001                     $(200,000)

                      July 31, 2001                      $   -0-

                      October 31, 2001                   $700,000

                      January 31, 2002                   $1,100,000


            (c) NET WORTH. Section 6.5 of the Loan Agreement shall be amended in
                its entirety to read as follows:

                "Section 6.5 NET WORTH. "On each of the Computation Dates
                set forth below, the Borrower shall not permit the Net
                Worth to be less than the minimum amount set forth below:


                                                           MINIMUM
                      COMPUTATION DATE                    NET WORTH
                      ----------------                    ---------

                      April 30, 2001                     $1,200,000

                      July 31, 2001                      $1,400,000

                      October 31, 2001                   $1,600,000

                      January 31, 2002                   $1,800,000


Borrower and Lender shall amend this Agreement on or before February 28, 2002,
     to provide covenant compliance (at minimum levels acceptable to Lender)
     under Section 6.4(a), 6.4 (b) and 6.5 for April 30, 2002, and each
     Computation date thereafter. If Borrower and Lender do not agree to
     amendments to such sections, the Borrower shall be deemed to be in default


<PAGE>   3


     under the terms of these sections."


            (b) Section 2 of the Loan Agreement shall be amended to add the
                following:

                "Section 2.12 ADDITIONAL SPECIAL PAYMENT. Borrower has accrued
                on its balance sheet at January 31, 2001 the sum of One Million
                Four Hundred Forty-two Thousand Two Hundred Eighty-five and
                01/100 Dollars ($1,442,285.01) (after giving effect to a Special
                Payment made by Borrower pursuant to the Third Amendment to Loan
                Agreement) as a liability to Lender, representing the amount of
                the additional fee accrued through January 31, 2001 to guarantee
                Lender a minimum compounded annual internal rate of return of
                twenty-five percent (25%) at maturity on July 31, 2004 pursuant
                to Section 2.3(c) of the Loan Agreement (the "Yield Guarantee at
                Maturity"). Borrower has agreed to pay to Lender the sum of Five
                Hundred Thousand Dollars ($500,000) of such accrued amount
                contemporaneously with the execution of this Fourth Amendment,
                April 2, 2001 (the "Special Payment Two"). Accordingly, upon
                payment in full of the Term Loan, Lender agrees to credit
                against the amount of the Yield Guarantee at Maturity due Lender
                an amount equal to the future value of Five Hundred Thousand
                Dollars ($500,000), compounded at an assumed interest rate of
                six percent (6%) per annum from the date hereof to the date of
                payment of the Term Loan. The amount so computed is referred to
                as the "Future Credit Amount." For example, if the Loan is paid
                in full at maturity on July 31, 2004, the Future Credit Amount
                shall be equal to Six Hundred Seven Thousand, One Hundred
                Sixty-eight and 18/100 Dollars ($607,168.18). Notwithstanding
                this Special Payment Two of Five Hundred Thousand Dollars
                ($500,000), Borrower shall be liable to Lender for the full
                amount of the Yield Guarantee at Maturity as if this Special
                Payment Two had not been made, and will continue to accrue an
                amount to satisfy such Yield Guarantee at Maturity on a monthly
                basis as if this Special Payment Two had not been made."

         2. REAFFIRMATION OF COVENANTS, REPRESENTATIONS AND WARRANTIES. Borrower
            hereby agrees and covenants that all representations and warranties
            in the Loan Agreement including, without limitation, all of those
            representations and warranties set forth in Article 4, are true and
            accurate as of the date hereof. Borrower further reaffirms all
            covenants in the Loan Agreement and reaffirms each of the covenants
            set forth in Articles 5 & 6 thereof, as if fully set forth herein,
            except to the extent modified by this agreement.

                  IN WITNESS WHEREOF, the parties hereto have executed this
            Amendment to Loan Agreement as of the 2nd.day of April, 2001.


              LENDER:                                         BORROWER:

<PAGE>   4

         THE HILLSTREET FUND, L.P.               LANVISION SYSTEMS, INC.


         By :     HillStreet Capital, Inc.       By: /s/ J. Brian Patsy
                                                    ---------------------------
         Its:     Investment Manager             J. Brian Patsy
                                                 Chief Executive Officer

         By:  /s/ Christian L. Meininger
            -----------------------------
         Christian L. Meininger, President

         Date:     4/2/01                        Date:   4/2/01
              ----------------------                   ------------